Sensor



FIG. 1 is a front view of a sensor, showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a side view thereof; and,

FIG. 5 is a perspective view thereof.

Broken lines in the drawings depict portions of the sensor that form no part of the claimed design. 

CLAIM The ornamental design for a sensor, as shown and described. 